Toggenburger



Aug. 17, 1954 J. TOGGENBURGER COMBINED TYPEWRITER AND PRINTING COMPUTINGMACHINE l4 Sheets-Sheet 1 Filed Dec. 21, 1948 IN V EN TOR. Jain @yenu yr &42 ATTDRNEY 1954 J. TOGGENBURGER 2,686,469 I COMBINED TYPEWRITER ANDPRINTING COMPUTING MACHINE Filed Dec. 21, 1948 14 Sheets-Sheet 2 mmvrox.

J. TOGGENBURGER Aug. 17, 1954 COMBINED TYPEWRITER AND PRINTING COMPUTINGMACHINE l4 Sheets-Sheet 3 Filed Dec. 21, 1948 31: INVENTOR. 90/1227599?]76'217967 ATTORNEY 1954 J. TOGGENBURGER 2,686,469

COMBINED TYPEWRITER AND PRINTING COMPUTING MACHINE Filed Dec. 21, 194814 Sheets-Sheet 4 L F OD m SPACE BAR smrr Rf INVEN TOR.

2 BY gwafwzz A TTORNEY Aug. 17, 1954 J TQGGENBURGER 2,686,469

COMBINED TYPEWRITER AND PRINTING COMPUTING MACHINE Filed D80. 21, 194814 Sheets-Sheet 5 INVEN TOR e/m E e/zbzn ("7 N BY 5211 07134717 ATTORNEY1 1954 J. TOGGENBURGER 2,686,469

COMBINED TYPEWRITER AND PRINTING COMPUTING MACHINE 14 Sheets-Sheet 6Filed Dec. 21, 1948 4% IMMINIIIII l IIIIIIIIIIIIIIIIIII INVENTOR.

BY jail: @mu'yn 22m (22%;

ATTORNEY Aug. 17, 1954 J. TOGGENBURGER 2,686,469

COMBINED TYPEWRITER AND PRINTING COMPUTING MACHINE Filed Dec. 21, 194814 Sheets-Sheet 7 /NVEN T0R jut/z B f/Inga BY wczfwv TTORNE Y Aug. 17,1954 I J. TOGGENBURGER 2,686,469

COMBINED TYPEWRITER AND PRINTING COMPUTING MACHINE Filed Dec. 21, 194814 Sheets-Sheet 8 O jar/222 @elzu aer ynn fi $57 p ATmRNEY Aug. 17, 1954J. TOGGENBURGER 2,685,469

COMBINED TYPEWRITER AND PRINTING COMPUTING MACHINE Filed Dec. 21, 194814 Sheets-Sheet 9 l Ill/l II Ill 1 $55 fl INVENTOR. BY enbm aer ATTORNEYOMBINED TYPEWRITER AND PRINTING COMPUTING MACHINE Filed Dec. 21, 1948 14Sheets-Sheet 1,0

INVENTOR.

BY Zrzamuyef Aug. 17, 1954 J. TOGGENBURGER COMBINED TYPEWRITER ANDPRINTING COMPUTING MACHINE Filed D80. 21, 1948 14 Sheets-Sheet 11 fiTfRA/E Y COMBINED TYPEWRITER AND PRINTING COMPUTING MACHINE l4Sheets-Sheet 12 Filed Dec. 21, 1948 INVENTOR. ammyer W 71%;;

ATTORNEY 7, 1954 J. TOGGENBURGER 2,685,469

COMBINED TYPEWRITER AND PRINTING COMPUTING MACHINE Filed Dec. 21, 194814 Sheets-Sheet l3 INVEN TOR.

BY jafin 7511927511346? Af' aii Patented Aug. 17, 1954 COMBINEDTYPEWRITER AND PRINTING COMPUTING MACHINE John Toggenburger, Hartford,Conn., assignor to Underwood Corporation, New York, N. Y., a

corporation of Delaware Application December 21, 1948, Serial No. 66,441

37 Claims. 1

This invention relates to typewriting and computing machines in general,and with regard to certain aspects thereof, more particularly tocombined structures of such machines, embodying typewriting facilitiesas well as printing facilities for recording computed amounts.

Such structures are well known in the art, but usually some desirablefeatures inherent in conventional typewriting, and/or computingmachines, are compromised to obtain an operative structure. In someprior combined machines the recording or printing facilities of theadding or computing mechanism is located relatively to a typewritingpoint, so as to require wasteful, timeconsuming and awkward movements ofa papersupporting carriage to obtain recordings from the typewriting andthe calculating mechanism in adjoining relation on a recording medium.In many other known machines the view to the printing line is obstructedor the machine lacks in other respects.

It is a main object of the invention to provide typewriting facilitiesin efiicient association with printing facilities for a computingmechanism.

It is also an object of the invention to provide a machine of the abovecomposite species, which embodies the important and desirable featuresusually contained in modern computing or adding machines, and whichincludes in advantageous association therewith efliciently functioningtypewriting facilities.

Particularly it is also an object to provide an efiicient machine of thenoted composite species which requires no complicated movements of apaper-supporting carriage to effect typewriting and calculatingrecording in close adjacency, and which gives a clear view of all therecorded matter.

It is a very important object also to provide in such a combined machinea typewriting mechanism which includes a type guide that is always inposition to serve its intended purpose.

Another object of the invention is to provide a machine which includes acomplement of computing machine printing members that are closelyadjacent to one side of a typewriting point which is common to a set oftypewriting elements, preferably saidprinting members being adapted tomove to appropriate printing positions from retired positions exposingthe printing line.

It is also an object to provide typewriting facilities and computingmachine printing facilities in a combined structure so organized thateither of the two facilities are readily operatable without conflictwith each other. I

An additional object is to provide for imprints by the computing machinemechanism by efficient imprint effecting means.

It is a further .object to effect computing machine imprints quietly, inan efficient manner, preferably by pressing seriatim the selected typesto printing position.

An important object of the invention is to provide for imprints offdifferentially adjusted, adjacent printing members by a rolling meansrolling across such members and thereby seriatim effecting imprinttherefrom.

Also an object of the invention is to operate differentially printingmembers with considerable clearance from the front of a platen, then tomove collectively such printing members nearly or lightly into contactwith the platen, and thereafter to press the types seriatim against theplaten for quiet and efficient printing,

It is a further object of the invention to provide in association withprinting bars 18, efficient means, non-conflicting with the typewritingmechanism, whereby to obtain imprints of 0s off significant orderprinting members only.

It is an object also to provide reliably operative, efiicient,key-responsive power indexing devices for setting up numerical valuesfor the computing mechanism.

Moreover, it is an object to provide efficiently operative power means,for typewriting, as well as for setting up numerical values in thecomputing mechanism.

It is a further object to provide settable means to render the samenumeral keys controlling for either power typewriting or for the settingup of values in the computing mechanism.

An object is also to provide eificient means to condition the machinealternatively for type- Writing and computing in different columns.

One of the objects is to provide an efficient cycle-operatabletabulating mechanism which at the termination of each tabulating run ofthe carriage functions to place the carriage under letter-feed controlof the typewriting mechanism.

In conjunction with the foregoing objects, it i also an object toprovide for return of the carriage beyond the initial columnar position,and for efficient automatically operative means to tabulate the carriagethereafter to the initial column.

A further object is to provide efficient carriage controlled meanswhereby machine cycles will produce tabulating movements only if the carriage is stationed in a particular column or columns.

The noted objects are embracive of only some of the new features of theinvention, and addi tional objects will readily be perceived from thedetailed description hereinafter following.

In building the machine herein featured, there has been used to a largedegree the mechanism embodied in the standard Sundstrand Class CAccounting Machine, as generally exemplified in the patent to Sunstrand,No, 2,194,270, dated March 19, 1940. In regard to the typewritingmechanism, use has been made of much of the. mechanism contained in theUnderwood All- Electric Typewriter recently placed on the market.

Turning now to the drawings:

Figures 1 and 1A, matched together along the vertical dot and dash linein each of these figures, constitute a sectional, left-hand sideelevation of applicants composite typewriting and printing computingmachine,

Figure 2 is a fragmentary front elevation showing a typewriter segmentwith an upward- 1y projecting type guide, and a set of-computing machineprinting bars located adiacently to the type guide,

Figure 3. is. a plan view, showing; the keyboard of applicants compositemachine, and showing additionally a mechanism for pressing addingmachine type bars seriatim against a, platen and thereby effectingimprints,

Figure 4; is. a fragmentary front. view showin some of the keys seenFigure 3 and partial..-- larly a set of digit keys and some control.keys, together with operative control trains. leading therefrom,

Figure 5. is a fragmentaryuleft-hand side elevation, depicting theimprint. effecting mecha.- nism shown in Figure 3, and additionally amach. anism whereby imprints be restricted iiQ printing bars ofsignificant orders. The view additionally shows a. mechanism whereby theimprint effecting mechanism is controlled to operate only if at least.one printing bar rises to a significant position, v

Figure. 6. is a fragmentary front elevation showing some of themechanism also. seen in Figure 5-,

Figure '7 is a perspective View from the rightfront side of the machinelooking down upon cycle instituting and related mechanism,

Figure 8; is a plan view of the imprint efiecting device seen in Figure3, in a position. of readiness for action upon the; adding machine.printing bars,

Figure 9: is similar to. Figure 8, but, shows. the imprint efiectingdevice. in an intermediary stage of action,

Figure 10 is similar to Figures8 and 9;, but the imprint efiectingdevice has done its. Work and is about to return to normal position,

Figure 11 is a sectional front view ofportions of a mechanism forrenderingthe digit keys potentially operative either with respect to thetyping or with respect to an amount set-up or indexing mechanism,

Figure 121s aleft-hand side. elevation showing the, mechanism of Figure11, and includingv a manually settable controlling device set for thedigit keys to serve in amount indexing capacity,

Fi ure 13. is a left-handsectional viewdepicting a mechanism to move.the printing. bars collectively nearer to the platen preparatory to theimprint effecting means, coming intov action,

Figure 14: shows the manual control device of 4 Figure 12 set so thatthe digit keys are in control of the typewriting instrumentalities,

Figure 15 is a fragmentary right-hand side elevation depicting certainfunction control keys and showing also a blank-cycle enforcing mechamsm,

Figure 16. is a. sectional front elevation taken substantially alonglines l6- l B- of Figure 1A, and showing a carriage tabulating mechanismin a normal condition in which the carriage is under control of a,letter-feed escapement.

Figure 17 is a view similar to Figure 16, but the carriage tabulatingmechanism has been operated and; the carriage is in the process ofexecuting a tab ulating movement,

Figure 18 is a frontal, fragmentary sectional view a. special selectoras having been carriage actuated, to render the digit keys controllingwith respect to the adding machine indexing mechanism,

Figure 19. is a diagrammatic right-hand sectional representation of theframework support! ing the typewriting and the adding machine.instrumentalities,

Figure 20: a front sectional view similar to Figure 17, but with thetabulating mechanism ready to. assume normal condition at. the end ofthe tabulating run,

Figure 21 is a representation. of a work-sheet together with a.diagrammatic representation. of a set of control dogs tl'lerefor,v

Figure 22. (on sheet with Figure l); is a plan view of av conventionalmachine cycling; drive, and

Figure 23 is a fractionalside elevation of a mechanism to. incapacitatethe function selectors of the. machine.

The description of the invention hereinafter following is divided underthe following head:-- ings:

l. Work-sheet supporting carriage 2. Typewriting mechanism andaddingmachine printing bars 3. Letter-feed mechanism forwork-sheetsupporting carriage Computing mechanism and printing meanscontrolled thereby 5. Crossfooter and operating means therefor- 6'. Rearregisters 7. Machine cycling means 8, Cycle key 9.. Cycle and otherfunction controls by' carriage and keys 10.. Carriage tabulating andreturning mechanism 11, Automatic control means to condition digit keysfor typewriting or amount indexing 12. Manual control to, conditiondigit keys for typewriting or amount indexing 13; Incapacitation offunction control selectors for typewriting 1,4. Imprint effecting meansfor computing machine printing bars 15;. Means to provide for imprintsof significant order o y 16.. Zero, total signified. by printing of twoZeros 17. Means to prevent idle operation of imprint eifecting means 18.More on functionv control. keys 19; Blank cycle enforcing means. 20..Other control keys; '21. Main assembly units. 22*. Work example. 23.Conclusion 1. Work-sheet supporting r ge 2. Typewriting mechanism andadding machine I printing bars The carriage with its platen H is commonto a set or array of typewriter type bars l1 and a group of addingmachine printing bars l8 and |8a, the bars l8 being digit printing barsand a bar |8a having signal types. The typewriter type bars H arepivotally mounted upon a segment 20 for actuation from diversive normalpositions, to. print at a common typewriting point I9 that is situatedabove a type guide 2|. The adding machine printing bars I8 and [8a. arenormally retired below the said typewriting point and are as a grouppreferably directly adjacent to the left of the type guide, see Figures2 and 3. The type bar segment 20 is generally of conventional design,but occupies a position sufficient- 1y forward of the platen to affordoperating space for the printing bars I8 which are directly in back ofthe segment and normally somewhat in front of the platen, the segment 20having preferably a clearance cut as at 22 for accommodating it asclosely as possible to the platen. Since the segment has a more forwardposition than is customary in conventional typewriters, typing heads 23on the type bars are correspondingly carried thereon in more projectingrelations of approach towards the platen. All type bars have at theirheads a lip 24 for guiding entrance in the type guide 2| as each typebar approaches its printing position. The type guide 2| is very close tothe front of the platen I and is secured to the rear of the type barsegment 20, as at 25. The guiding lips 24 in cooperation with the typeguide 2| assure that'the typing impressions are made at the exactlocation of the typewriting Point 19. The adding machine printingmembers |8 are confined as a group between the left side of the typeguide 2| and a. guide element 21 reaching upwardly from the segment 23,see Figures 2 and 3.

Said printing members or bars |8 are thus at one side of the typewritingpoint and within the lateral limits of the array of diversive type barsl1.

The various type bars [1 are guided in slots 3| of the segment 20 whichconverge directly below the type guide 2|. The various type heads 23 andtheir guiding lips 24 approach the platen in upright relation, as isconventional in typewriters. A type bar in typing position is indicatedin dot and dash lines, in Figure 2.

The operating mechanism for-thetypewriter type bars |1 will now bedescribed, and it is to be observed that in the main this mechanism islike that disclosed in the patent to Yaeger, No. 2,254,7 4, datedSeptember 2, 1941.

In the swinging plane of each type bar 11 lies a bell crank 32 which bya push link 33 has an operative connection with the type bar. All saidbell cranks 32, and all said links 33, are identical. The bell cranks 32are pivotally supported in an arcuate bar 34 which for the purpose hasradial guide slots and which carries an arcuate pivot wire 35 common toall the bell cranks. Forwardly of the bell cranks 32 there are pivotedon a straight fulcrum wire 36, a set of upright levers 31, individuallyswingable forwardly and each connected by a link 38 to an upreaching armof one of the bell cranks 32. The upright levers 31 are of gradedlengths, exactly as in the said patent' to Yaeger, No. 2,254,764, andhave each a rolling face 40. A pendant lever 4| lies directly to therear of each rolling face 40 for rolling contact therewith. The arms 4|are pivotally carried on a bar 42, in a straight row and have eachpivotally connected thereto, in a rearwardly reaching relation, a typeaction driving link or actuator 43. The rear of each actuator 43 isurged upwardly and rearwardly by a spring 44, against the bottom of anangle bar 45, so that a snatch pawl 46 thereon is normally clear of aconstantly rotating toothed power shaft 41, the latter being common toall the snatch pawls. The actuators 43 and the snatch pawls lie in a rowextending parallel to the power shaft 41.

The said snatch pawls 46 are selectively connectable, transitorily withthe power shaft 41 by imparting to the actuators 43 downwarddisplacement about their pivotal connections with the arms 4|. Theselective connections are effected under control of a set of alphabetand digit keys respectively numbered 50 and 5|. Said keys are on levers49 which are pivoted to the rear of the power shaft 41 in a slotted bar52, and which have each, pivotally carried thereon, as at 54, inupreaching relation a link 53 having a hook-end normally posed over alateral protuberance 55 of the actuator 43. The links 53 have capacityfor some rearward displacement about said pivots 54 against the tensionof light springs 56, the normal position of each link with respect toits associated key lever 49 being established by contact therebetween,as at 51. Near their front ends the key levers 49 are vertically guidedin slots of a comb plate 60. Springs at the rear urge the levers 49upwardly to their normal positions seen in Figure 1.

It will thus be seen that by selective operation of the keys 49 adesired actuator 43 will be drawn down for association of its snatchpawl 46 with the power shaft 41, and that consequently such actuatorwill become power operated forwardly and will through rolling action ofthe arm 4| on the lever 31 operate the appropriate type action.

Normally the segment 20 and the arcuate bar 34 are located in a lowercase position, as shown in Figure 1, so that the lower case type (thetype nearer the type bar pivot) will swing to the printing point l9. Acase shift mechanism, not shown, is provided to give, when desired, thesegment 20 and the bell crank suporting bar 34 a lower position whereinthe upper case types will swing to the typewriting point IS. The segment2|] and the arcuate bar 34 constitute a unitary movable case shiftstructure and to this end the arcuate bar at each side of the type barsystem has a rearward reach as at 63, see Figure l, and affords a flange64 at each side of the segment to secure the latter thereto, as byscrews 65, see Figures 1, 2 and 3. Said case shiftable structure isguided for case shift movement substantially in the planein which thegroup of adding machine printingmembers '18 he Asseen in .thedrawings,said printing bars .or members [8 withreference to said segmentarerearwardly tilted'from the bottomtthereof and contiguous thereto atthe top. The direction of caseshift is indicatedin Figure-l, by the.showing of a ball and raceway atBS. Such direction ofshiftagreeswiththetilt' to which the printing bars [8 lie when they are operated againstthe platen, and,.moreover, the types of any'operated type bar 11 willlie substantially parallel with. the direction of said shift, It is tob'eunderstood that the points of connection of theilinks 38 with: therolling levers?! and the bell cranks 32. are located to provide forsimilar type bar actuation While typingin either type case.

.The'snatch pawlsw are disconnectedirom the power roll at desiredpointsin each operating stroke. This is .accomplishedunder control ofabutments .on a bar G1,- which are encountered. by cam'faces provided onthe underside of the ac-- tuators #3 just infront oi the snatch .pawls.

The describedtyping mechanism differs from the onedisclosed in thepatentto Yaeger, No, 2,25 l,764 only by the interepositioni ng of the bellcranks 32 and the links 33 between thelinks .38 and'the type bars H.This change was made in order to have the operating connections for thetypebars H forward of the type bar pivots and thereby to allowthepositioning of the segment 20. as closely as possible to the addingmachine printing .bars t8 and the platen.

The'typewriting mechanism just described is supported by atypewriterframe generally designated by the numeral W-andcomprisingtwospacedsside walls H which. are rigidly connected by theaforedescribed bars 42 and 2, as wellas other bars.

3. Letter feed mechanism for work-sheet supporting carriage Referring toFigure l, the carriage H) has supported thereon a letter feed rack l2;Supported on the typewriter frame: it, ina manner not shown, is anescapment wheel 13 carrying. a pinion M normally mesh with said rack 12.The rack. 72 has teeth at letter-feed intervals and is releasable fromthe pinion .14 at will for repositioning thexcar riage. Accordingly,therach is carried at opposite ends of the carriage, by arms 15 havingfinger pieces Hi extending upward-Ly therefrom. to swing the rackabovethe pinion M, Springs Tl associatedwith the arms 75 maintaintherack l2 releasably in. mesh. with the pinion 14-. The carriage isconstantly urged in letter-teed. direction, that is, leftwardly, un-

der the tension of. a conventionalcarriage feed spring generallyindicated at 1-8, see Figure lA. However, a letter-teed: escap'ment 841associated with the escapement wheel 13 exercises normally control overthe carriage to hold it in Whatever letter-feed position it maybepositionedt This escapement may be the same asis commonly used in thestandard Underwood typewriter and is rockable by operation of each typeaction: to feed the carriageone letter feed stepa Namely,, each of thebell cranks 32 is adapted to operatean arcuate universal. bar 8t,giving. the: latter a short movement of translation forwardly. Theuniversal: bar 81 ineludestwo rearwardly ream.- hig bars- 82' which attheir rear are supportedand articulated v upon spaced, upreachin'gi arms83 of rocker frame having an axis at as. A: down reaching arm 84 ofthe-rocker frame is operatively communicative with the. eseapeiiient bymeans of a link 86. The rocker frame axis casesliifts unitarily with thesegment 20. The universal bar 'BI and its associated parts are springrestored. The curved universal bar '8"! is nestedclosely to the front ofthe arcuate bar '34 and has one or more guiding pins 81 extendingthereinto. From the above it will be seen that each power operation of atype bar I! will be accompanied by a transitory operation of theuniversal bar 8! and that the carriage consequently will execute aletter-feeding step following each typing impression made by one ofthetype bars ll.

4. Computing mechanism and printing means controlled thereby The addingmachine printing bars l8 are lightweight in structure and each hasalong. its rear side a row. of digit types 94, the uppermost type oneachtype bar being a 0' type and those be low being progressively ofhigher digits. The printing bar's 8 abut each other normally at leastdown to the point of the lowest type is, and as a group are containedindividually slid ablelengthwise between the type guide 2| and. themember 21', as before stated. Eachpriiiting bar l8 may be caused to risedifferentially under control of an adding machine mechanism which in itsmajor respects is identical with thecom venti'onally marketed SundstrandClass C Accounting Machine, disclosed. in the above men'- tioned PatentNo. 2,194,270. Specifically; the machine comprises for each of theadding machine printing bars l8 a differential actuator '95, all ofwhich are guided for vertical movement in a-usual manner, at the top bya bar 96}. and at a lower level by a bar 91, these bars bein notched tospace the actuators laterally. The bars 96 and 97 extend between and arecarried fast on two usual spaced. frame members 92' ofithe addingmachine framework, see Figures 1, 2, .9 andiothers. The printing bars idare of reduced thickness belowthe types ill to intersperse them with thedifferential actuators eachprinting bar having its associated. actuatorclosely to the right thereof. Motion is transmitted from eachdifferential actuator 95 toi ts associated. printingbar by motionmultiplying means,v preferably comprising a relatively large gear 9'8in: mesh witha gear-rack- H15- on the lower end of. the printing bar It,and a smaller gear or pinion to! in mesh with a rack Hi2 formed on thedifierential actuator 9-5, the-two gears being united for rotatioritogether. The: severalpairs oi gears 98 and. lfll are turnably supportedin a row ona fixed supporting rod. as as shownin-Fig-ure 2} Thedifferential actuators are structurally very similar to those shown inSundstrand Patent No 2,l 94",2 7'0 but are ending just abovethesupporting bar 96, whereabove in said patent they carry digit types thatare individually hammer actuatable thereon. Dueto the provision of thegears .98 and till. the movement of. the printing bars is are enlargedwith respect to the movements of" the differential actuators 95, forwhich reason'the types 91' can'be spaced widely enough along the bars toive" always clear, individual t ping im I pressions whenmoveurearwardiy, into printing engagement with the platen; OIi-theQtherhand; the type selecting d'ifi erential movements or the bars 95 arerelatively small, making it feasible to build an" adding machinemechanism of remtivel small proportions. The various actuators 95 haveeach anindividual -l'iftmg lever Wrasse pins I08, ready in elatedtherewith by a pin and slot connection, as shown, each lifting lever I04being under constant tension of a lifting sprin I 05. In the normalcondition of the machine, however, a universal bar I06 overlies theselevers I 04 so that the actuators 95 and the printing bars I8 arepositioned lowermost as seen in Figure 1. During each machine cycle theuniversal bar I06 rises an the springs I05 associated with the leversI04 will cause the actuators 95 and their associated printing bars torise differentially, as called for by a particular item entry or by atotal printing operation, the mechanism employed for this being in manyregards the same as in said Patent No. 2,194,270.

An amount indexing mechanism, generally designated by the numeral I 01,see Figure 1, controls the differential rise of the actuators 95 foritem" entries. This indexing mechanism includes a conventional bed ofstops, comprising a plurality of adjacent vertical rows of stop pinsI08, each vertical row containing 10 pins, representative, beginningfrom the bottom upwardly, the digit values from to 9, and there being asmany adjacent rows of pins as actuators 95.

At the rear of the bed of pins I08 there are arranged in a transverselymovable carriage I II a series of adjacent tail pins I I2 which areslidable in vertical perforations therein. Normally said carriage islocated so that therightmost pin II2 is a short space to the left of thebed of pins I 08. Each tail pin II2 has extending through a perforationat the bottom thereof a forward extension II 3 of one of the actuators95, the various extensions H3 having hinged association as at I I4 withtheir related actuators. The tail pin carriage III constitutes adenomination shifting carriage and is slidably supported on a transverserod H5 in the machine.

Progressively beginning with the leftmost row, index pins I 08 are setin accordance with the digit value to be represented. For this purposethere is articulated with the denominational carriage I I I, as at I H,the rear end of an arm I I8 that is fulcrumecl on a vertical pin I20 toswing horizontally. The arm II8 carries an upright post I I 9 near therear end thereof, wherethrough .there extends a vertical row of pushrods I2I for setting the index pins I 08. These rods are adapted toswing with the arm H8 progressively into operative alignment with theseveral rows of index pins 503. Before commencin to index an amount inbed of pins I08, the push rods I2I are directly in front of the leftmostrow of index pins !08. In a manner to be explained later, the push rodsI2I are selectively operated to index one index pin first in theleftmost row. Thereupon the denominational carriage I| I movesrightwardly one step to place the rightmost vertical tail pin I 12 inalignment with the first row of pins I08. Another selective operation ofthe push rods I01 may then be effected, and being that the push rods I2!are then in alignment with the second row of pins I08, a pin willconsequently b set in this row. There follows another denominationalshift of the carriage III, as before, and the indexing operations may berepeated as required by the amount to be indexed. After the desiredvalue has been indexed, the appropriate sensing pins II2 will havebecome positioned underneath the appropriate rows of set index a cycleto limit to the upward movement of the actuators 95 and associated 10printing bars in accordance with the value represented by the set pins.

Referring to Figure 1, the push rods I2I have pivotal connections, as atI25, with arms I23. The latter are all alike and are carried forindividual horizontal swinging movement on a vertical stud I24 toactuate the rods I2I rearwardly. All said pivotal connections I 25 liesubstantially in a vertical line directly in line with the fulcrum pinI20 of the swinging arm I I8. It follows, therefore, that the push rodsI2I swing with the arm I I8 and are operable by the arms I23 to index apin I08 of whatever vertical row may be opposite it. The arms 023 arespring restored in a manner well known, to positions wherein the rearends of the push rods I2I are clear of the bed of index pins I08, asshown inFigure 1.

A novel mechanism is provided to power actuate the push rod actuatingarms I23 under control of the same digit keys 5I by which the numeraltypewriting actions are called into operation. Referring to Figures 1,11 and 12, the levers 49 which have the digit keys 5|, carry eachpivotally attached thereto a pendant element I21. Whenever the keys 5|are operated for typewriting numerals, said pendant elements I21 vibrateidly down and up with their associated key levers 49.

From Figure 1 it will be seen that in front of said pendant elements I2!there lie forwardly reaching levers I28 which at their front ends eachcarry pivotally a snatch pawl I30. The latter are normally below andclear of a toothed power roll I3I which, while the machine is in use, isconstantly power rotated in the direction of the arrow. The said leversI28, see Figures 1 and 4, are supported upon pivot pins I29 provided onshort arms I32 that are mounted and upreaching for forward swingingmovement upon the lugs I33 on a stationary rod I34 in the machine.Whenever the keys 5| are to be operative for amount indexing operation,the draw links 53 for connecting the type action actuators 43 must berendered inoperative and, conversely the pendant elements I21 must bebrought into cooperative alignment with the rear ends of the levers I28.

To this end a unitarily pivoted structure is provided, which includesspaced side members I35 pivotally carried on studs I39 provided on theopposite side walls II of the typewriter, and which includes further anupper bar I36 and a lower bar I31 rigidly connecting said side membersI35. When the digit keys 5I are to be operative for typewriting, thestructure I35, I36, I 31 is in the pivotal position seen in Figure 1. Bymeans to be described later, the said pivoted structure is swung to theposition seen in Figure 12 whenever it is required that the keys 5| beoperative for amount indexing function in connection with the addingmachine mechanism.

Observing from Figure 1, it will be seen that the pull links 53, byreason of the forward position of the rod tion with regard to thetypewriter actuators 43, and that the pendant elements I27, by reason ofthe position of the rod I31, are normally lying to the rear of theactuator levers I 28, the springs I38 urging the pendant elements I27 tolean resiliently rearwardly against the rod I31.

In the position of the pivotal structure I 35, I36, I31 shown in Figure12, the rod I36 has displaced the pull links 53 rearwardly forincapacitation thereof about the pivot 54, while the rod I31 has swungall the pendant elements I2! into operative relation over the rear endsof the levers I36, are normally in operative rela-- I28. Therefore whenthe digit keys 'areselectively operated while the structure I35, I35,I31 is set as seen in Figure 12, the pendant elements I21 will rock thelevers I28 selectively to engage the appropriate snatch pawls I39 withthe toothed shaft I3I, the rocked lever I23 consequently receivingbodily a power motion rearwardly, and the arms I32 being rearwardlyswinging during such motion.

Operatingtrainslead from the pivot pin I22 on eacharrn I32 to theappropriate push rod operatingarms I23 of the indexing. mechanism.

These trains, see Figure 4, include identical links I42 articulated tothe pins I29 and extending downwardly therefrom. With the exception ofthetwo most'centrally located links I42 in the machine, all these linksare connected to bails I43 that are rockable on a stationary rod I44 andembody upreaching arms I45 individually associated with the -variouspush rod operating arms The bails I43 are variously shaped, as shown,reaching from their points of connection with the links I42 inwardlyfrom opposite sides to provide'the upreaching arms I45 in a cluster infront of the arms I23. I43 includea forwardly reaching arm I43 to whichone of the links I42 is connected. From the two middle links I42, themotion to their associated push rod'operating arms I23 is transmitted bytwo simple bell cranks, each including, as the said bails, anupreachingarm I45 and a forwardly reaching arm I46. All the arms I45have an operating nose I41 directly in front of the appropriate arm I23,said noses being arranged relative to the various arms I23 at variousarm lengths, preferably in an echelon arrangement asshown in Figure 4,in order that equal angular motion received by the'various arms I45willresult in equal angular motions of the push rod operating arms I23.Some of the bails have intermediate web portions I56. This is toprovidethat the lateral order of the upreaching arms I45 isthe same asthe lateral order of the related links I42, and thereby to make possiblesaid echelon arrangement of the noses I41.

The bail supporting rod I44 iscarried on lugs I5I that project rigidlyfrom a stationary cross bar I52 in the machine. Two of these lugs flankthe cluster or array, of upreaching arms I45 and, in conjunction withspacing washers between the various upreaching arms I45, determine thelateral positions of the latter, and, therefore, the

bails I 43.

The actuator levers I 28 rest normally near their forward ends upon astationary angularly shaped cross bar I56. This is under the urge ofsprings I51 which are anchored to the bar I56 and draw the levers I28downwardly and forwardly. The normal positions of the actuator leversI28 may beindirectly determined through engagement of the bail and bellcrank structures embodying the arms I45, with the lower front side ofthe bar I52.

As each of the actuator levers I23 is driven rearwardly by the powershaft I3 I, and as consequently, the index pins in the various tiersbecome set, each actuated actuator lever I 22, by coaction of a cam faceI60 thereon with an abutment screw IBI, cams such actuator downwardly toseparate its snatch pawl I33 from the power shaft I3I. The abutmentscrews IBI are adjustably carried on a transverse bar I62 fastened uponthe adding machine framework;

Each actuator lever I23 is preferably operated All the bails 1 only oncefor each actuation of. its associated digit key 5|. To this end, seeFigures 1 and 4,

the rearward endsof the actuator levers I28 may have each a laterallyprojecting lug I63 for engagement by the related pendant member I21,each engaged lug IE3 riding off the rear of the pendant members I21 aseach lever I28 is being actuated. Subsequently during the return of theactuated lever I23, the pendant member I21, if remaining operated, isidly displaced about its pivotal connection on the key lever 43 by saidlug I63, wherefore the pendant member I21 can reassume its potentiallyeffective position over said lug I63 only after a restoration of thedigit key. The snatch pawl I30 has capacity for some limited pivotalmotion on the actuator I28 to the end of assuring a full engagement withthe power shaft I3I.

A structure, which in the standard Sundstrand machine hereinabove notedhouses a group of 10 digit keys, is retained in the present compositemachine, although these keys are replaced by the keys 5I. This is forthe support of some old aswell as new mechanism. Referring to Figures 1and 4, this housingstructure comprises a base plate I64 fastened as atI65, Figure 1, to the base frame I61 of the adding machine. It furthercomprises two spaced side walls I68, I63. The bars I34, I62, I56 arepreferably carried by these side walls I68, I69. The bottom panel I64has clearance perforationsfor some of the links I42 and some of theupreaching arms I45.

Upon each successive indexing operation effected under control of a key5i, the denominational carriage III, see Figure 1, executes adenomination shifting step to the right as seen from the front of themachine. Referring to Figures 1 and 4, this is done under control of thepush rod actuating arms I23 in a usual manner, through operation of auniversal bar I'II that is pivoted coaxially with the arms I23 and whichhas connection by means of av link I12 with. a usual escapement deviceI13, the denominational shifting carriage III being urged to feedrightwardly under power of a spring, not shown.

A usual device, not shown, is provided at the left of the index pin bedto restrict the rise of all actuators of insignificant order to riseOnly to 0 position. This device, as is conventional in said zSundstrandmachine, is incapacitated during total printing operations, when it isdesired that all actuators 95 be allowed to rise in accordance with theamounts to be total printed.

5. Crossfootcr and operating means therefor The differential actuators95 have each a rearward extension 2m to each of which there is connectedan adding rack 2H and a subtracting rack 2I2. A register 2I3, henceforthto be referred to as a crossfooter, inasmuch as it is capable ofaddition and subtraction, is arranged between the racks 2I I and 2 I2,and is adapted to be shifted horizontally into mesh with either theadding or subtracting racks, in the same mannor as in said patent toSundstrand No. 2,194,270.

The crossfooter 2I3 comprises a series of individual pinions 2I4rotatively mounted upon a transverse shaft 2 I5 that is shiftablerearwardly or forwardly to mesh the pinions 2 I4 respectively with theadding racks 2II or the subtracting racks 2I2. The racks 2H and 252 areattached to the rearward actuator branches 2 III by means of mountingstuds 2I6 on said branches which reach through short vertical slots 211in said

